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WaterMasterAdministrator
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Reged: 02/17/10

Loc: Southeast Idaho, USA
Re: Need help! dirty Primary mirror on 114EQ! ! [Re: Crazyhorse1876]
      #5650230 - 01/29/13 12:41 PM

Quote:

That's the plan right now tonight thank you very much! Also how about the use of fingers to lightly clean with the soapy water that I have read about???




Unless you have something really glued on to your mirror, try to avoid touching it with anything but liquid while you're cleaning. But if you have to, I recommend light fingers rather than cotton balls.

I put my mirrors under running water in the sink for a while, then I try to get the mirror as level as possible in the bottom of the sink so that the water fills the concavity - then I add a couple of drops of soap if needed and let is set for a few minutes, followed by more running water.

Then set the mirror on its side and rinse with either distilled water or 90% isopropyl alcohol.


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Crazyhorse1876
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Reged: 01/26/13

Loc: Left Coast U.S.A.
Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: WaterMaster]
      #5650611 - 01/29/13 03:39 PM

Don't want to touch mirror at all if I don't have to so it will be the soak and rinse method.

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Crazyhorse1876
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Reged: 01/26/13

Loc: Left Coast U.S.A.
Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: Jon Isaacs]
      #5651319 - 01/29/13 10:46 PM

Mirror has been reinstalled back into cell and cell has been reinstalled back into OTA and is nice and clean! Also I installed the the center mark on the mirror and have collmated the telescope. Everything turned out just fine. Not bad for having this Bird-Jones newtonian telescope for just over a month. Thanks to everyone for your help and suggestions.

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WaterMasterAdministrator
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Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: Crazyhorse1876]
      #5651334 - 01/29/13 10:56 PM



Something we forgot to mention - when you replace the mirror in the cell the retaining clips should not be touching the mirror. I use a business card as a gauge between the mirror and the clips. If you have them tight you might induce some pinching of the primary (which is pretty obvious when you do a star test).


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Crazyhorse1876
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Reged: 01/26/13

Loc: Left Coast U.S.A.
Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: WaterMaster]
      #5651343 - 01/29/13 11:06 PM

So the rubber pads on the clips "should not be touching the mirror at all and the clearance should be in such a way that you can slide a business card between pad and mirror correct??? When I did the disassemble I noted that the rubber pads were touching the morror from the factory. I will check the clearance right now. And this clearance will not allow the mirror to slide around in the cell correct?

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panhard
It's All Good
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Reged: 01/20/08

Loc: Markham Ontario Canada
Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: Crazyhorse1876]
      #5651363 - 01/29/13 11:19 PM

Steve I mentioned that earlier on.

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Crazyhorse1876
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Reged: 01/26/13

Loc: Left Coast U.S.A.
Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: panhard]
      #5651370 - 01/29/13 11:22 PM

Clearance has now been set on all clips just as you all said. Thank you again.

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WaterMasterAdministrator
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Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: panhard]
      #5651411 - 01/29/13 11:43 PM

Quote:

Steve I mentioned that earlier on.




Thanks, Herb. Was in a hurry and didn't look back at previous posts.

The clips are only there to hold the mirror from falling out of the cell when you're near horizontal. There should have been spacer pads inside the cell to hold the mirror from shifting when you change altitude.

Guess I should have checked to see if somebody else said that already, too.

Perhaps I'm multi-tasking a little too much.


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panhard
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Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: WaterMaster]
      #5651416 - 01/29/13 11:48 PM

Steve you have had a lot to worry about lately.
ps I am glad to see you around more now.


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Crazyhorse1876
super member


Reged: 01/26/13

Loc: Left Coast U.S.A.
Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: WaterMaster]
      #5651423 - 01/29/13 11:52 PM

Pads were there...clearances are set now as you all discribed so I am very happy with the way everything turned out.

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WaterMasterAdministrator
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Reged: 02/17/10

Loc: Southeast Idaho, USA
Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: Crazyhorse1876]
      #5651430 - 01/30/13 12:01 AM

Great news, Crazyhorse

And thanks again Herb, it's great to be 'home'.


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Jon Isaacs
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Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: WaterMaster]
      #5651733 - 01/30/13 07:52 AM

Quote:


Unless you have something really glued on to your mirror, try to avoid touching it with anything but liquid while you're cleaning. But if you have to, I recommend light fingers rather than cotton balls.




The advantage of cotton balls is that they can be "floated" across the mirror so there is very little force and what force there is spread over a large area. I use a wad of about 6 balls and just float it across the surface of the mirror. This is not for removing a spot but when the entire surface needs more attention than a soak and rinse provide.

Jon


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WaterMasterAdministrator
Moat Keeper
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Reged: 02/17/10

Loc: Southeast Idaho, USA
Re: Need help! dirty Primary mirror on 114EQ! ! new [Re: Jon Isaacs]
      #5652131 - 01/30/13 11:45 AM

Quote:

I use a wad of about 6 balls and just float it across the surface of the mirror. This is not for removing a spot but when the entire surface needs more attention than a soak and rinse provide.




Thanks Jon, that's a great idea. I've a mirror that used to belong to a smoker and I've been contemplating how I'll attack cleaning it. Soak and rinse hasn't been adequately successful as yet. I even tried an alcohol soak but Cathy complained about the smell (and it didn't really work anyway) .


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